Air Mail Routes GPO McKnight KaufferRare original vintage advertising poster for the GPO General Post Office Air Mail Routes featuring a great design by the notable artist Edward McKnight Kauffer (1890 1954) showing the worldwide air mail routes in red, white and blue connecting cities marked on a map of the world against a stylised silhouette of a hand on a cloudy blue sky background, the title text in red and blue with a blue By Air Mail Par Avion sticker on the side and the crown GPO